Engineer Bit Pits are compact locking screwdriver bit holders that connect to your keychain, belt loop, or gear bag. They work with any 1/4″ hex power bits, so you can swap in any size or style of your choosing. If you would rather use 1″ insert bits than 2″ and longer power bits, you’ll just need an extra bit holder adapter such as the Wera Rapidaptor.
Bit Pits are made in Japan and are priced at about $10 each plus shipping. The bit holders come with a keyring, but without bits or a carabiner.